ExamAdept

Which of the following is an example of polymorphism through method overloading?

A:

Defining a method with the same name but different parameters in a class

B:

Defining a method with the same name but different return types in a class

C:

Defining a method with the same name in a class

D:

Defining a method with different access modifiers in a class

Answer: A

Polymorphism through method overloading in Python involves defining a method with the same name but different parameters in a class.

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What is the purpose of the __str__() method in Python classes in the context of polymorphism?

A:

To define class attributes

B:

To create a new instance of the class

C:

To represent the object as a string for display purposes

D:

To access superclass attributes directly

Answer: C

The __str__() method is used to represent the object as a string for display purposes, providing a human-readable representation.

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Which of the following is an example of polymorphism through operator overloading?

A:

Using the + operator to concatenate strings

B:

Using the + operator to add two numbers

C:

Using the + operator to access a list element

D:

Using the + operator to define a custom behavior in a class

Answer: D

Polymorphism through operator overloading in Python involves defining custom behavior for operators in a class, such as using __add__() for the + operator.

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What is the purpose of the __call__() method in Python classes in the context of polymorphism?

A:

To create a new instance of the class

B:

To customize the behavior when an instance is called as a function

C:

To customize the behavior when an instance is deleted

D:

To access superclass attributes directly

Answer: B

The __call__() method is used to customize the behavior when an instance is called as a function, allowing for polymorphic behavior.

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Consider the following code:

class Shape:
    def area(self):
        pass

class Triangle(Shape):
    def area(self, base, height):
        return 0.5 * base * height

class Square(Shape):
    def area(self, side):
        return side * side

What concept is demonstrated in this code?

A:

Operator overloading

B:

Method overloading

C:

Method overriding

D:

Polymorphism

Answer: B

This code demonstrates method overloading, where the subclass methods have the same name but different parameters than the superclass method.

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Questions for: Polymorphism